Image Compressor
Shrink image size with controlled quality loss
Image Compressor: You Control Quality, Size Shrinks
Email attachment, web upload or form limit — a slider solves the big-photo problem.
Phone photos now weigh 5-15 MB, while email attachments, application forms and websites often cap uploads at 1-2 MB. This tool shrinks your image in seconds — with one critical difference from most competitors: your file is never uploaded to any server. Compression runs entirely in your browser using canvas technology, so even sensitive images like ID photos can be processed with peace of mind. Drag your image in, move the quality slider and watch the result live: the new size and savings percentage update with every setting. Download the output as JPEG (most compatible) or WebP (smaller at the same quality). Quality between 70-80% is visually indistinguishable for most photos; below 50% the loss becomes noticeable.
Features
Never Uploaded
Compression happens on your device — files never travel.
Quality Control
You choose the size-quality balance with a slider.
Live Preview
New size and savings update with every adjustment.
JPEG + WebP
Download the result in either modern format.
Compression Guide
Quality recommendations
- 80-95%: archiving and print — virtually no difference
- 70-80%: the ideal balance for web and social media
- 50-70%: email attachments, form uploads — slight softening
- Below 50%: small but visibly lossy
Good to know
- JPEG doesn't support transparency (transparent areas turn white)
- WebP is ~25-30% smaller than JPEG at the same quality
- Compression keeps resolution — use the resize tool for that
- PNG screenshots shrink dramatically when converted to JPEG
Frequently Asked Questions
Is my photo uploaded to a server?
No — that's this tool's key difference. Compression runs entirely on your device via the browser's canvas technology; your file is never sent anywhere over the internet. Close the page and no trace of your image remains.
Which quality setting should I choose?
70-80% is ideal for web and social media: size drops sharply while the difference stays invisible. For print, stay at 85-95%; if you just need to hit an upload limit, 50-60% works.
Should I pick JPEG or WebP?
WebP is roughly 25-30% smaller at the same visual quality and supported by all modern browsers. If the image goes to an older system, an official form or print, JPEG remains the safest choice.
What happens to a transparent PNG?
JPEG doesn't support transparency, so transparent areas become white. To keep transparency, choose WebP as the output — it preserves it while still shrinking the file.
Does compression lower the resolution?
No — this tool keeps pixel dimensions (e.g. 4000×3000) and only reduces the file's disk size. To also lower resolution, use our Image Resizer; applying both gives the smallest file.
Is there a size limit?
No practical one; since processing happens on your device, speed depends on your phone or computer. Photos up to 50 MP process in a few seconds on modern devices.